Ex 2.2, 1 - Find value of polynomial 5x - 4x2 + 3 at - Value of a polynomial at a given point

 


  1. Class 9
  2. Important Questions for Exam - Class 9
Ask Download

Transcript

Ex 2.2, 1 Find the value of the polynomial  5x -4x2 + 3 at (i) x = 0 Let p(x) = 5x – 4x2 + 3 Putting x=0 p(0) = 5 × (0) – 4 × (0)2 + 3 = 0 – 0 + 3 = 3 Ex 2.2, 1 Find the value of the polynomial 5x -4x2 + 3  at (ii) x = −1 Let p(x) = 5x – 4x2 + 3 Putting x = –1 p(-1) = 5 × (-1) – 4 × (-1)2 + 3 = -5 – 4 × (1) + 3 = -5 – 4 + 3 = -6 Ex 2.2, 1 Find the value of the polynomial 5x -4x2 + 3  at (iii) x = 2 Let p(x) = 5x – 4x2 + 3 Putting x = 2 p(2) = 5 × (2) – 4 × (2)2 + 3 = 10 – 4 × (4) + 3 = 10 – 16 + 3 = -3

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 7 years. He provides courses for Mathematics and Science from Class 6 to 12. You can learn personally from here https://www.teachoo.com/premium/maths-and-science-classes/.
Jail